BEIJING Theyre paralyzed from diving accidents and car crashes, disabled by Parkinsons, or blind. With few options available at home in America, they search the Internet for experimental treatments and often land on Web sites promoting stem cell treatments in China.

They mortgage their houses and their hometowns hold fundraisers as they scrape together the tens of thousands of dollars needed for travel and the hope for a miracle cure.

A number of these medical tourists claim some success when they return home.

Jim Savage, a Houston quadriplegic, says he can move his right arm. Penny Thomas of Hawaii says her Parkinsons tremors are mostly gone. The parents of 6-year-old Rylea Barlett of Missouri, born with an optical defect, say she can see.

But documentation is mostly lacking, and Western doctors warn that patients are serving as guinea pigs in a country that isnt doing the rigorous lab and human tests that are needed to prove a treatment is safe and effective.

Effectiveness questioned Noting the lack of evidence, three Western doctors undertook their own limited study. It involved seven patients with spinal cord injuries who chose to get fetal brain tissue injections at one hospital in China. The study reported no clinically useful improvements even though most patients believed they were better. Five developed complications such as meningitis.

Experts in the West have theories about why some people think theyve improved when the evidence is thin. Some are often getting intensive physical therapy, along with the mysterious injections; the placebo effect may also be a factor.

John Steeves, a professor at the University of British Columbia who heads an international group that monitors spinal cord treatments, has another theory. Some patients may be influenced by the amount of money they paid and the help they got from those who donated or helped raise money.

Needless to say, when they come back, what are they going to report to their friends and neighbors? That it didnt work? said Steeves. Nobody wants to hear that.

He and other experts have written a booklet advising patients who are considering such treatments.

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